Where is the fuel reset switch located on a 1992 Chevy Blazer S-10?

There is no fuel reset switch on a 1992 Chevy S-10 Blazer (or any other vehicle of that era, for that matter). Fuel systems don't typically have a reset switch in the way some other systems might. If you're having fuel-related problems, it's likely a more complex issue requiring diagnostic work by a mechanic, and not a simple switch reset.